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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtWebEngine module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef RENDER_WIDGET_HOST_VIEW_QT_H
#define RENDER_WIDGET_HOST_VIEW_QT_H

#include "render_widget_host_view_qt_delegate.h"

#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "cc/resources/transferable_resource.h"
#include "content/browser/renderer_host/render_widget_host_view_base.h"
#include "ui/base/gestures/gesture_recognizer.h"
#include "ui/base/gestures/gesture_types.h"
#include <QMap>
#include <QPoint>
#include <QRect>
#include <QtGlobal>

class BackingStoreQt;

QT_BEGIN_NAMESPACE
class QEvent;
class QFocusEvent;
class QHoverEvent;
class QKeyEvent;
class QMouseEvent;
class QTouchEvent;
class QVariant;
class QWheelEvent;
QT_END_NAMESPACE

class WebContentsAdapterClient;

struct MultipleMouseClickHelper
{
    QPoint lastPressPosition;
    Qt::MouseButton lastPressButton;
    int clickCounter;
    ulong lastPressTimestamp;

    MultipleMouseClickHelper()
        : lastPressPosition(QPoint())
        , lastPressButton(Qt::NoButton)
        , clickCounter(0)
        , lastPressTimestamp(0)
    {
    }
};

class RenderWidgetHostViewQt
    : public content::RenderWidgetHostViewBase
    , public ui::GestureConsumer
    , public ui::GestureEventHelper
    , public RenderWidgetHostViewQtDelegateClient
    , public base::SupportsWeakPtr<RenderWidgetHostViewQt>
{
public:
    RenderWidgetHostViewQt(content::RenderWidgetHost* widget);
    ~RenderWidgetHostViewQt();

    void setDelegate(RenderWidgetHostViewQtDelegate *delegate);
    void setAdapterClient(WebContentsAdapterClient *adapterClient);
    BackingStoreQt* GetBackingStore();

    virtual content::BackingStore *AllocBackingStore(const gfx::Size &size) Q_DECL_OVERRIDE;

    virtual void InitAsChild(gfx::NativeView) Q_DECL_OVERRIDE;
    virtual void InitAsPopup(content::RenderWidgetHostView*, const gfx::Rect&) Q_DECL_OVERRIDE;
    virtual void InitAsFullscreen(content::RenderWidgetHostView*) Q_DECL_OVERRIDE;
    virtual content::RenderWidgetHost* GetRenderWidgetHost() const Q_DECL_OVERRIDE;
    virtual void SetSize(const gfx::Size& size) Q_DECL_OVERRIDE;
    virtual void SetBounds(const gfx::Rect& rect) Q_DECL_OVERRIDE;
    virtual gfx::Size GetPhysicalBackingSize() const Q_DECL_OVERRIDE;
    virtual gfx::NativeView GetNativeView() const Q_DECL_OVERRIDE;
    virtual gfx::NativeViewId GetNativeViewId() const Q_DECL_OVERRIDE;
    virtual gfx::NativeViewAccessible GetNativeViewAccessible() Q_DECL_OVERRIDE;
    virtual void Focus() Q_DECL_OVERRIDE;
    virtual bool HasFocus() const Q_DECL_OVERRIDE;
    virtual bool IsSurfaceAvailableForCopy() const Q_DECL_OVERRIDE;
    virtual void Show() Q_DECL_OVERRIDE;
    virtual void Hide() Q_DECL_OVERRIDE;
    virtual bool IsShowing() Q_DECL_OVERRIDE;
    virtual gfx::Rect GetViewBounds() const Q_DECL_OVERRIDE;
    virtual void SetBackground(const SkBitmap& background) Q_DECL_OVERRIDE;
    virtual bool LockMouse() Q_DECL_OVERRIDE;
    virtual void UnlockMouse() Q_DECL_OVERRIDE;
#if defined(TOOLKIT_GTK)
    virtual GdkEventButton* GetLastMouseDown() Q_DECL_OVERRIDE;
    virtual gfx::NativeView BuildInputMethodsGtkMenu() Q_DECL_OVERRIDE;
#endif  // defined(TOOLKIT_GTK)
    virtual void WasShown() Q_DECL_OVERRIDE;
    virtual void WasHidden() Q_DECL_OVERRIDE;
    virtual void MovePluginWindows(const gfx::Vector2d&, const std::vector<content::WebPluginGeometry>&) Q_DECL_OVERRIDE;
    virtual void Blur() Q_DECL_OVERRIDE;
    virtual void UpdateCursor(const WebCursor&) Q_DECL_OVERRIDE;
    virtual void SetIsLoading(bool) Q_DECL_OVERRIDE;
    virtual void TextInputTypeChanged(ui::TextInputType, bool, ui::TextInputMode) Q_DECL_OVERRIDE;
    virtual void ImeCancelComposition() Q_DECL_OVERRIDE;
    virtual void ImeCompositionRangeChanged(const ui::Range&, const std::vector<gfx::Rect>&) Q_DECL_OVERRIDE;
    virtual void DidUpdateBackingStore(const gfx::Rect& scroll_rect, const gfx::Vector2d& scroll_delta, const std::vector<gfx::Rect>& copy_rects, const ui::LatencyInfo&) Q_DECL_OVERRIDE;
    virtual void RenderProcessGone(base::TerminationStatus, int) Q_DECL_OVERRIDE;
    virtual void Destroy() Q_DECL_OVERRIDE;
    virtual void SetTooltipText(const string16&) Q_DECL_OVERRIDE;
    virtual void SelectionBoundsChanged(const ViewHostMsg_SelectionBounds_Params&) Q_DECL_OVERRIDE;
    virtual void ScrollOffsetChanged() Q_DECL_OVERRIDE;
    virtual void CopyFromCompositingSurface(const gfx::Rect& src_subrect, const gfx::Size& /* dst_size */, const base::Callback<void(bool, const SkBitmap&)>& callback) Q_DECL_OVERRIDE;
    virtual void CopyFromCompositingSurfaceToVideoFrame(const gfx::Rect& src_subrect, const scoped_refptr<media::VideoFrame>& target, const base::Callback<void(bool)>& callback) Q_DECL_OVERRIDE;
    virtual bool CanCopyToVideoFrame() const Q_DECL_OVERRIDE;
    virtual void OnAcceleratedCompositingStateChange() Q_DECL_OVERRIDE;
    virtual void AcceleratedSurfaceBuffersSwapped(const GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params& params, int gpu_host_id) Q_DECL_OVERRIDE;
    virtual void AcceleratedSurfacePostSubBuffer(const GpuHostMsg_AcceleratedSurfacePostSubBuffer_Params& params, int gpu_host_id) Q_DECL_OVERRIDE;
    virtual void AcceleratedSurfaceSuspend() Q_DECL_OVERRIDE;
    virtual void AcceleratedSurfaceRelease() Q_DECL_OVERRIDE;
    virtual bool HasAcceleratedSurface(const gfx::Size&) Q_DECL_OVERRIDE;
    virtual void OnSwapCompositorFrame(uint32 output_surface_id, scoped_ptr<cc::CompositorFrame> frame) Q_DECL_OVERRIDE;
    virtual void GetScreenInfo(WebKit::WebScreenInfo* results) Q_DECL_OVERRIDE;
    virtual gfx::Rect GetBoundsInRootWindow() Q_DECL_OVERRIDE;
    virtual gfx::GLSurfaceHandle GetCompositingSurface() Q_DECL_OVERRIDE;
    virtual void SetHasHorizontalScrollbar(bool) Q_DECL_OVERRIDE;
    virtual void SetScrollOffsetPinning(bool, bool) Q_DECL_OVERRIDE;
    virtual void OnAccessibilityNotifications(const std::vector<AccessibilityHostMsg_NotificationParams>&) Q_DECL_OVERRIDE;
    virtual void ProcessAckedTouchEvent(const content::TouchEventWithLatencyInfo &touch, content::InputEventAckState ack_result) Q_DECL_OVERRIDE;

    // Overridden from ui::GestureEventHelper.
    virtual bool DispatchLongPressGestureEvent(ui::GestureEvent *event) Q_DECL_OVERRIDE;
    virtual bool DispatchCancelTouchEvent(ui::TouchEvent *event) Q_DECL_OVERRIDE;

    // Overridden from RenderWidgetHostViewQtDelegateClient.
    virtual void paint(QPainter *, const QRectF& boundingRect) Q_DECL_OVERRIDE;
    virtual QSGNode *updatePaintNode(QSGNode *, QQuickWindow *) Q_DECL_OVERRIDE;
    virtual void fetchBackingStore() Q_DECL_OVERRIDE;
    virtual void notifyResize() Q_DECL_OVERRIDE;
    virtual bool forwardEvent(QEvent *) Q_DECL_OVERRIDE;
    virtual QVariant inputMethodQuery(Qt::InputMethodQuery query) const Q_DECL_OVERRIDE;
    virtual void compositingSurfaceUpdated() Q_DECL_OVERRIDE;

    void handleMouseEvent(QMouseEvent*);
    void handleKeyEvent(QKeyEvent*);
    void handleWheelEvent(QWheelEvent*);
    void handleTouchEvent(QTouchEvent*);
    void handleHoverEvent(QHoverEvent*);
    void handleFocusEvent(QFocusEvent*);

#if defined(OS_MACOSX)
    virtual void SetTakesFocusOnlyOnMouseDown(bool flag) Q_DECL_OVERRIDE { QT_NOT_YET_IMPLEMENTED }
    virtual void SetActive(bool active) Q_DECL_OVERRIDE { QT_NOT_YET_IMPLEMENTED }
    virtual bool IsSpeaking() const Q_DECL_OVERRIDE { QT_NOT_YET_IMPLEMENTED; return false; }
    virtual void SpeakSelection() Q_DECL_OVERRIDE { QT_NOT_YET_IMPLEMENTED }
    virtual bool PostProcessEventForPluginIme(const content::NativeWebKeyboardEvent& event) Q_DECL_OVERRIDE { QT_NOT_YET_IMPLEMENTED; return false; }
    virtual void AboutToWaitForBackingStoreMsg() Q_DECL_OVERRIDE { QT_NOT_YET_IMPLEMENTED }
    virtual void StopSpeaking() Q_DECL_OVERRIDE { QT_NOT_YET_IMPLEMENTED }
    virtual void SetWindowVisibility(bool visible) Q_DECL_OVERRIDE { QT_NOT_YET_IMPLEMENTED }
    virtual bool SupportsSpeech() const Q_DECL_OVERRIDE { QT_NOT_YET_IMPLEMENTED; return false; }
    virtual void ShowDefinitionForSelection() Q_DECL_OVERRIDE { QT_NOT_YET_IMPLEMENTED }
    virtual void WindowFrameChanged() Q_DECL_OVERRIDE { QT_NOT_YET_IMPLEMENTED }
#endif // defined(OS_MACOSX)

#if defined(OS_ANDROID)
    virtual void ShowDisambiguationPopup(const gfx::Rect&, const SkBitmap&) Q_DECL_OVERRIDE { QT_NOT_YET_IMPLEMENTED }
    virtual void HasTouchEventHandlers(bool) Q_DECL_OVERRIDE { QT_NOT_YET_IMPLEMENTED }
#endif // defined(OS_ANDROID)

private:
    void sendDelegatedFrameAck();
    void Paint(const gfx::Rect& damage_rect);
    void ProcessGestures(ui::GestureRecognizer::Gestures *gestures);
    int GetMappedTouch(int qtTouchId);
    void RemoveExpiredMappings(QTouchEvent *ev);

    bool IsPopup() const;

    content::RenderWidgetHostImpl *m_host;
    scoped_ptr<ui::GestureRecognizer> m_gestureRecognizer;
    QMap<int, int> m_touchIdMapping;
    WebKit::WebTouchEvent m_accumTouchEvent;
    scoped_ptr<RenderWidgetHostViewQtDelegate> m_delegate;

    BackingStoreQt *m_backingStore;
    scoped_ptr<cc::DelegatedFrameData> m_pendingFrameData;
    cc::TransferableResourceArray m_resourcesToRelease;
    uint32 m_pendingOutputSurfaceId;

    WebContentsAdapterClient *m_adapterClient;
    MultipleMouseClickHelper m_clickHelper;

    ui::TextInputType m_currentInputType;
    QRect m_cursorRect;
    size_t m_anchorPositionWithinSelection;
    size_t m_cursorPositionWithinSelection;

    bool m_initPending;
    bool m_readyForSurface;
};

#endif // RENDER_WIDGET_HOST_VIEW_QT_H